what headwork do you need to do to make the 300bhp mark?
also which injectors? (is it posible on 803's)?
which turbo? (can it be done on a t3 with a t34 compressor wheel?
thanks in advance !

 

i take it your doin a 1.6cvh? ported head newman cam double valve springs solid lifters,forged pistons an rods,803s at a push with a hybrid t3 turbo.the list is endless

 

Stage 3 big valve head is must as stock valves bottle neck at around 250bhp, Newmans cam i'd agree with but not double valve springs they specifically say not to use them! Even a Stage 3 T3 (48/55) would not flow enough for 300+bhp i'd look at something bigger! Dont know what 803's are good for. Pistons, rods, yup and arp bolts to hold it all together!

 

mines 300+ and i dont have a stage 3 head, running pretty much standard valves just ported and polished with a uprated cam and double valve springs.
and my turbo is a stage 3 t3 and that is managing fine with 300.

Agree-bottom end must be steel rods and forged pistons though!

 

Interesting! Where was it Dyno'd?
NMS and APT have both told me that the standard valve size become restrictive at around 240-250bhp, and a Stage 3 T3 is only rated to 280bhp max!

Turbo Techincs website...
http://www.turbotechnics.com/docs/turbo/s107.htm
TURBO TECHNICS LIMITED

 

mark shead built an engine 6+years ago on a standard head,285bhp

 

standard valves are already big to start with mate,also i know a few people running st3 t3s running 320hp its a very good turbo,you can get the mahle pistons machined for lower comp they will run 350hp,but change the rods to steel,then you will run into gearbox issues if thats standard

 

tried a couple of dynos mate and both reading about the same or near 303bhp and 310bhp.
mines a s1 head which i believe had the better valves to start with so maybe he was refering to a s2 head?

 

Hold on, are you for real?

Stage 3 T3, 320bhp?

You DON'T know a FEW people with 320bhp, well, not on a CVH anyway. Not a PROPER 320bhp.

 

At what boost? Can we see graphs please?

Sounds like I need to rethink my strategy. I'm obviously not trying hard enough.

 

sorry wot i should of said was ive heard of a few people running over 300+ on a st3 turbo obviously ringing its neck and standard sized valves are already big

 

if you phone turbo technics up they will tell you st3 turbo is good for 280hp but you can run more, if you run more you will damage the engine that is the reply i got from them

 

my t3 was not run of the mill and i pushed the beejeesus out of it to get over 300

 

thats wot i ment gus at a push you can get over 300,there are more ways than 1 to tune a cvh

 

it didnt last long


i was also running aggresive als aswell mind

 

not suprised running anti lag,did you have a maram shaft in there too

 

not at the time (i did after)

tom scarlets made over 300 on a t3

 

if i rightly remember toms did 319hp, if you had the maram shaft from the start it would of been ok

 

it was after

but

it was maxxed out

 

Ok perhaps some people believe it is possible........... maybe it is at an extreme push? Maybe some rollers say 'X'bhp and other 'Y'bhp.........but lets just say that it will be easier, and more reliable with a Stage 3 head and a bigger spec turbo, I think thats the best answer!

 

i would just build a blacktop zetec piss 350 horse on a standard head and cams

 

 

IMO a T34 0.48 will only just do 320bhp, let alone a T3.

Mind you, there are some funny old Dyno's out there.

Mines 400bhp, by the way.

 

do agree dyno's are so out that they should only be regarded as an estimate of the power, things like ambient temps, barometric pressure, all play a big part.

 

well done christian you die hard cvh boys are really pushing the boundries now,saw your car at the fair sunday and like how you have the cage in the full interior,looks very tight bud.

 

Fuck!!
Have you actually broke the 400bhp mark or are you just taking the piss out of Dyno accuracy??
I cant tell by your tone of voice?! lol

 

No, not 400bhp. LOL.

Yet. (joke, 400bhp isn't going to happen. 350 and I'd be well happy).

 

well i like my dyno reading cos its higher than others

so its good for me

we need that arse dyno

 

Mine is 400bhp on the arse dyno. It also MUST be that power, it certainly sounds like it is.

 

Even on standard valve springs?!

 

mine is at man power still

no horses are involved in the moving of my car


just a strong back and grippy trainers

 

no, area six springs in mine ,but its hardly a modified head

 

But standard springs won't do 350bhp, so they need changing... so a 'standard' head won't do that power.

 

wot he ment was you dont need lairy cams ported and polished head,to break the 300+ barrier uprated springs are hardly a highly modified head, more for less thats my moto anyway

 

I was nit picking. LOL

 

it is a 1600cvh. it has wosner 7-5-1 forged pistons,burton h-section steel conrods, oversized valves,ported and polished head and a piper 285t2 camshaft


which you will all be pleased to know i am getting rid of !! for sale if anyones intrested...... as im going for a newman cam with solid lifters . I've spoke to NMS and they have a custon cam & springs from newman that they say are the nuts? anyone have these?

 

good choice there bud,you wont go far wrong with the nms boys,i believe its there own profile for race specification

 

yes you are right they wont do 350bhp fuck i couldnt get any more than 9psi into my engine on standard springs with a t34.48 and .55.

still did 270 odd bhp tho.

 

i have 1

 

just out of interest Tim, but what is it like for driveability? do you know if it'd be any good on an engine only running about 260bhp?


regards

Tom